An Approach to Build a P2P Content Distribution Structure of High Performance

It is well known that content distribution networks (CDN) are expensive technologies for distributing web contents. Universities and other non-profit organizations do not have enough financial means to deploy large web-servers or to use content distribution networks to improve their web access performance. In this work, we aim at building a hybrid P2P CDN network for web content distribution. Our proposed approach combines CDN efficiency with the advantage of P2P network. In short, we choose the peers whose capacities are high enough to be directory peers which play roles as CDN servers. And other peers named Content Peers keep the web content that they have ever accessed and serve the cached content to other peers who are close to them in the locality. Directory Peers and Content Peers are connected with each other using gossip protocols. We also propose an approach named Tri-DHT to search objects among directory peers. If a new peer wants to find some web content, it joins in the content overlay as a content peer. Then it chooses the nearest peer to get the file. A theoretical analysis shows that this approach can take advantage of P2P and CDN, and this solution can improve the user experience of websites accessing.